feat: GSF add final multi-component state to track container

[benjaminhuth]

This is triggered if the GSF finds the column "gsf-final-multi-component-state" in the track container. This does not yet include writing into a root file, since there is no TrackContainerWriter or something similar yet.

[codecov]

Codecov Report

Merging #1928 (b4d3e9e) into main (6e35712) will increase coverage by 0.00%.
The diff coverage is 57.14%.

@@           Coverage Diff           @@
##             main    #1928   +/-   ##
=======================================
  Coverage   49.82%   49.83%           
=======================================
  Files         421      421           
  Lines       23878    23900   +22     
  Branches    10835    10844    +9     
=======================================
+ Hits        11898    11910   +12     
- Misses       4366     4367    +1     
- Partials     7614     7623    +9     

Impacted Files	Coverage Δ
Core/include/Acts/TrackFitting/GsfOptions.hpp	100.00% <ø> (ø)
...re/include/Acts/TrackFitting/GaussianSumFitter.hpp	41.78% <50.00%> (+0.35%)	⬆️
Core/include/Acts/TrackFitting/detail/GsfActor.hpp	43.97% <60.00%> (+0.82%)	⬆️

... and 1 file with indirect coverage changes

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[github-actions]

📊 Physics performance monitoring for b4d3e9e

Full report
Seeding: seeded, truth estimated, orthogonal
CKF: seeded, truth smeared, truth estimated, orthogonal
IVF: seeded, truth smeared, truth estimated, orthogonal
Ambiguity resolution: seeded, orthogonal
Truth tracking
Truth tracking (GSF)

Vertexing

Vertexing vs. mu

IVF seeded

IVF truth_smeared

IVF truth_estimated

IVF orthogonal

Seeding

Seeding seeded

Seeding truth_estimated

Seeding orthogonal

CKF

CKF seeded

CKF truth_smeared

CKF truth_estimated

CKF orthogonal

Ambiguity resolution

seeded

Truth tracking (Kalman Filter)

Truth tracking

Truth tracking (GSF)

Truth tracking

[paulgessinger]

Is this useful for debugging only, or also for primary outputs?

[benjaminhuth]

Hmm so in principle this is not only for debugging, e.g. it could be useful in LDMX, but also I have some plans myself to try some things with this.

However, before that I will need to add a proper writer... But I would do this seperately, since I'm not yet sure how to approach this.